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Stornesite-(Y)

A variety of Chladniite
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Colour:
Pale yellow (in standard thin sections)
Specific Gravity:
3.196 (Calculated)
Crystal System:
Trigonal
Name:
For the Stornes Peninsula, where the first recorded locality is situated, and for Yttrium being the dominant REE element in its composition.
A variety of Chladniite

An Y-bearing chladniite. Originally described as a new mineral, the Y-dominant analogue of Chladniite by Grew et al. (2006).

Discredited by the IMA in February 2020 (IMA Newsletter 54).


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Unique IdentifiersHide

Mindat ID:
28918 (as Stornesite-(Y))
1008 (as Chladniite)
Long-form identifier:
mindat:1:1:28918:0 (as Stornesite-(Y))
mindat:1:1:1008:1 (as Chladniite)
GUID
(UUID V4):
71f2a2ba-85ba-4c84-aede-d6fbbb23d700 (as Stornesite-(Y))
b582cd8d-d459-4c5c-a149-9f505139304a (as Chladniite)

IMA Classification of Stornesite-(Y)Hide

Discredited
IMA Formula:
Na6(Ca5Na3)YMg43(PO4)36
Approval year:
2005
First published:
2006
Approval history:
Approved by IMA (2005-040).
Discredited in February 2020 by IMA as it is equivalent to Y-bearing chladniite.

Classification of Stornesite-(Y)Hide

Dana 7th ed.:
38.2.9.5

Physical Properties of Stornesite-(Y)Hide

Colour:
Pale yellow (in standard thin sections)
Density:
3.196 g/cm3 (Calculated)

Optical Data of Stornesite-(Y)Hide

Type:
Uniaxial (+)
RI values:
nω = 1.622 nε = 1.625
Max Birefringence:
δ = 0.004
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Crystallography of Stornesite-(Y)Hide

Crystal System:
Trigonal
Class (H-M):
3 - Rhombohedral
Space Group:
R3
Cell Parameters:
a = 14.9628 Å, c = 42.756 Å
Ratio:
a:c = 1 : 2.857
Unit Cell V:
8290 ų
Z:
3

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0004225Stornesite-(Y)Grew E S, Armbruster T, Medenbach O, Yates M G, Carson C J (2006) Stornesite-(Y), (Y, Ca)Vacancy2Na6(Ca,Na)8(Mg,Fe)43(PO4)36, the first terrestrial Mg-dominant member of the fillowite group, from granulite-facies paragneiss in the Larsemann Hills, Prydz Bay, East Antarctica American Mineralogist 91 1412-14242006Larsemann Hills, Prydz Bay, East Antarctica0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.67 Å(40)
3.52 Å(40)
2.94 Å(60)
2.73 Å(100)
1.84 Å(40)
Comments:
Format: d/Å (I/%) (hkl)

First Recorded Occurrence of Stornesite-(Y)Hide

General Appearance of First Recorded Material:
Anhedral to subhedral, locally euhedral grains with hexagonal or rhombic outlines, up to 1 × 0.25 mm in dimension.
Geological Setting of First Recorded Material:
Constituent of fluorapatite nodules included in paragneiss.
Associated Minerals at First Recorded Locality:

Synonyms of Stornesite-(Y)Hide

Other Language Names for Stornesite-(Y)Hide

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for Stornesite-(Y)Hide

References for Stornesite-(Y)Hide

Localities for Stornesite-(Y)Hide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Antarctica
 
  • Eastern Antarctica
    • Princess Elizabeth Land
      • Ingrid Christensen Coast
        • Prydz Bay
          • Larsemann Hills
Grew et al. (2006)
            • Stornes Peninsula
Grew et al. (2006) +1 other reference
 
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